11597507881 has 2 divisors, whose sum is σ = 11597507882. Its totient is φ = 11597507880.

The previous prime is 11597507821. The next prime is 11597507891. The reversal of 11597507881 is 18870579511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11488409856 + 109098025 = 107184^2 + 10445^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11597507881 is a prime.

It is a super-2 number, since 2×11597507881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11597507821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5798753940 + 5798753941.

It is an arithmetic number, because the mean of its divisors is an integer number (5798753941).

Almost surely, 2^11597507881 is an apocalyptic number.

It is an amenable number.

11597507881 is a deficient number, since it is larger than the sum of its proper divisors (1).

11597507881 is an equidigital number, since it uses as much as digits as its factorization.

11597507881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 52.

The spelling of 11597507881 in words is "eleven billion, five hundred ninety-seven million, five hundred seven thousand, eight hundred eighty-one".